Question

which of the following sequences are a.p. if they are a.p. find the common difference 12 , 2 , -8 , -18​

Answer 1

Step-by-step explanation:

A=12

A2=2

A3=-8

Common difference= A2-A1 and A3-A2

2-12=-10

-8-2=-10

Hence Common difference =-10